Justin Bieber + Backstreet Boys? Click To Watch This "As Long As You Love Me" Medley!

Long before Justin Bieber dominated the music industry with his chart-topping tunes, the Backstreet Boys ruled the airwaves with their hit single 'As Long As You Love Me.'

Released in 1997 when Bieber was probably trying to learn to explore words and language, the track has gone on to become one of their biggest selling singles.

The 'As Long As You Love Me' mashup features two friends on piano alternating between the chorus of Backstreet Boys's song and Just Bieber's verses. Michael Henry and Justin Robinett share the same piano while harmonizing alongside each other. With this, even the artists themselves took to Twitter and express how amazed they were with the mash-up: